基于微区玻化机制废弃玻璃粉活性与胶凝性及其混凝土性能的研究

项目名称： 基于微区玻化机制废弃玻璃粉活性与胶凝性及其混凝土性能的研究

项目编号： No.51468014

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 建筑环境与结构工程学科

项目作者： 刘光焰

作者单位： 桂林理工大学

项目金额： 48万元

中文摘要： 国内废弃玻璃90%未得到充分利用，已成占用土地和影响生态环境的突出问题。研究证实，废弃玻璃粉具有潜在水硬性和潜在火山灰性。申请者提出微区玻化方法，把废弃玻璃研磨成微小粉末，在适当热处理制度下形成富有火山灰性的废弃玻璃粉；通过控制过冷度和减低熔体表面张力使废弃玻璃粉在亚微米尺度（0.1-1μm）上进行，使废弃玻璃粉28天活性指数达到90%以上；在全面认识废弃玻璃粉本身的组成、结构和性能关系的基础上，把废弃玻璃粉作为混凝土掺合料替代部分水泥， 阐明废弃玻璃粉的组成特性与其潜在活性的关系及其激发机理，开发废弃玻璃粉作为混凝土胶凝材料；从复合体系的热力学、过程理论、界面化学和物理、结构优化、颗粒群特征参数等角度，提出适合混凝土胶凝效应使用的废弃玻璃粉，系统研究废弃玻璃粉混凝土的水化产物、微观结构特征，为废弃玻璃资源化利用推广提供理论和技术依据。

中文关键词： 废弃玻璃粉；混凝土；胶凝性；力学性能；微观结构

英文摘要： Currently, waste glass of more than 90% s has had a deteriorated effect on the occupation of land and the ecological environment and became a serious problem. It had been demonstrated that the waste glass powder had potential characteristics such as hydraulicity and pozzolanicity. This project proposed a micro area vitrification methods: waste glass was first grinded into tiny powder and processed rich pozzolanicity waste glass power under the proper heated treatment conditions. Through controlling the degree of supercooling and reducing melt surface tension, waste glass powder was pressed above submicron scale (0.1-1 μm) and more than 90% of activity index was obtained for 28 days. Based on the comprehensive understanding of the relationship of compositions, structures and properties of waste glass powder. As concrete cementitious material, the waste glass powder is replaced by partial cement, and the relationship of composition, its potential activity and excitation mechanism would be revealed in this project. From the composite system of thermodynamics, materials processing theory, interfacial chemistry and physics, structure optimization, and characteristic parameters of particle group, waste glass powder was proposed for the concrete with cementious effects. The hydration products, microstructure of concrete containing waste glass powder would be investigated systematically, and theoretical and technical basis are provided for waste glass resource utilization in the future.

英文关键词： waste glass powder;concrete;cementitious property;mechanical properties;microstructure